/Engine/Source/Runtime/MovieSceneTracks/Public/Sections/MovieSceneActorReferenceSection.h
Get this channel's default value that will be used when no keys are present
(Optional) The channel's default value
const [FMovieSceneActorReferenceKey](API\Runtime\MovieSceneTracks\Sections\FMovieSceneActorReferenceKey) & GetDefault() const